Circuit Adjustments - Sanyo PLC-XT35 Service Manual
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Also See for PLC-XT35:
- Service manual (156 pages) ,
- Owner's manual (78 pages) ,
- Specification sheet (2 pages)
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Electrical Adjustment
Circuit Adjustments
CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the following
adjustments except requiring the readjustments in servicing otherwise it may cause loss of performance
and product safety.
WArNING : uSe uV rAdIAtIoN eYe ANd SKIN
cAutIoN:
to prevent suffer of uV radiation, those adjustments
must be completed within 25 minutes.
[Adjustment Condition]
● Input signal
Video signal ....................... 1.0Vp-p/75W terminated, 16 steps gray scale
Computer signal ................... 0.7Vp-p/75W terminated, 16 steps gray scale
Component Video signal ...... 0.7Vp-p/75W terminated, 16 steps gray scale
● Picture control mode ........ "STANDARD" mode unless otherwise noted.
Note:
* Please refer to "Service Adjustment Menu Operation" for entering the service
mode and adjusting the service data.
z Fan Voltages adjustment
1. Enter the service mode.
. Connect a digital voltmeter to test point
chassis ground (-). (3 test points are provided for this
adjustment, perform all the voltage adjustments in
the table below.)
250
3. Select group no. "
change data value to adjust the voltage to be
0.05V.
250
4. Select group no. "
change data value to adjust the voltage to be
0.05V.
5. Repeat step to 4 for the remaining test points in
the table below.
Test Point A
Item No. B
K66D-1
K66E-1
K66F-1
ProtectIoN durING SerVIcING.
(Composite video signal)
pattern
pattern
A
(+) and
B
". Select item no.
4.5
c
". Select item no.
13.8
Item No. C
0
1
3
4
5
x Panel Type Check and Setting
* Before setting, you need to check which type of LCD pan-
el is placed on the projector according to the item "LCD
Panel/Prism Ass'y removal" in the chapter "Optical Parts
Disassembly".
1. Enter the service mode.
and
. Panel Type Check
±
Select group no. "
value as follows;
and
Data value: 0
±
Data value: 0 For R-Type of LCD panel
3. Panel Type Setting
Select group no. "
value from 10 to 0 or 0 depending on your LCD Panel
type. When the data value reaches 0 or 0, it returns
to 10 quickly. The gamma-characteristics changes ac-
cording to your selection.
Note:
Be careful to take this adjustment. The value of gamma
adjustment data will be reset and cannot be restored if
you change the mode of LCD panel type.
-59-
16 steps gray scale pattern
White 100%
290
0
", item no. "
". Check the data
For L-Type of LCD Panel
290
1
", item no. "
" and change data
Black 100%
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